Recoil device



Feb. 24, 1942. H. s. HUGHES I 2,274,239

RECOIL DEVICE i Filed April 25, 19:58

Patented Feb. 24, 1942 UNITED STATES PATENT OFFICE RECOIL DEVICE RobertH. S. Hughes, Baltimore, Md.

' Application April 25, 1938, Serial No. 204,174

2 Claims.

This invention relates to a recoil reducing device for guns which islight in weight and effective and which may be integral with the gunbarrel or formed separately and attached to the gun barrel.

The structure and advantages of the invention will be clear from thefollowing description, taken in connection with the accompanyingdrawing, in which Figure 1 is a side view of the forward end of a riflehaving a recoil controlling device integral with the barrel of therifle;

Figure 2 is a longitudinal section on the 2--2 of Figure Figure 3 is across section on the line 3-3 of Figure 2;

Figure 4 is a central longitudinal section through a recoil device andpart of a rifle barrel, the device being constructed for attachment tothe barrel;

Figure 5 is a longitudinal central section through part of a riflebarrel and an integral recoil device, a projectile being shown withinthe latter, the arrows indicating the direction of the discharge of thegasses.

Referring to Figure 1 of the drawing, l indicates the barrel of a rifleon which is mounted a sight 2 adjacent the muzzle 3, and extendingforwardly from the muzzle is a cylindrical recoil controlling device 4,integral with the barrel and having in its wall several series ofrelatively narrow circumferentially extending slots 5, the slots in eachseries being spaced apart longitudinally of the device and the forwardwall 6 of each slot extending forwardly and outwardly to approximatelythe rear edge of a succeeding slot in the same series, and the rear edgeof each slot extendingly outwardly in a substantially radial direction,as shown. The slots of each series are separated from the slots of adifferent series by the short webs l2.

Preferably I make the forward surfaces 6 of the slots 5 forming an angleof approximately 47 to 30 with a line forming a forward extension of thegun bore at the bottom of the grooves 9. The action of the gases isshown in Figure 5. In practice, as the bullet emerges from the muzzle ofthe gun, the gases traveling behind it move at a greater velocity thanthe velocity of the bullet.

The cone of expanding gases is included between lines [3. The anglebetween the lines I3 is approximately 41.

line

This 41 angle is for a standard U. S. .30'06 boat-tail bullet. Thisangle may vary with all the varying characteristics of charge,projectile and firearm. The number of slots may cause variation also inthis angle. The forward surface 6 should make an angle such that theexpanding gases are not deflected by such surface.

In Figure 5, a bullet I4 is shown passing through the central apertureIll. The central aperture ID, as before described, has a diameterapproximately equal to that of the bore 1, when measured from the bottomof the rifling grooves. This gives a sufficiently close fit to make therecoil control practical in operation and yet permits a definite breakin the contact of the bullet with the bore proper of the firearm. Theform of device just described will eliminate approximately 35% of therecoil. It is very light in weight and easy to form on the muzzle of thefirearm.

Yet another form of device is shown in Figure 4. This form is adetachable form and comprises a body ll provided with a central aperturel8 which has screw threads I9 engaging screw threads 20 formed on themuzzle 3. An aperture 2! is formed in the body 1 adjacent the muzzle 3.The tubular part 4 of this recoil device has several series of slots 5in its wall, the forward wall 6*- of one slot sloping forwardly andoutwardly to approximately the rear wall of the next slot in the seriesand the rear wall of each slot extending outwardly in a substantiallyradial direction, the same as in Figures 1 and 2. In Figure 4 websbetween adjacent series of slots are indicated at 24, 24 and the latteris shown at the under side of the device, where it would prevent thedownward discharge of gases and tend to eliminate climb.

I claim:

1. Recoil reducing means for guns adapted to fire projectiles comprisinga cylindrical member constructed to be supported by the gun barrel andto project in advance of its muzzle, said member having a bore ofuniform diameter to line with the bore of the barrel through which the-projectile may pass, and having a series of relatively narrowcircumferentially extending slots in its-wall spaced apartlongitudinally of said member and constituting ports for the dischargeof products of combustion directly to the atmosphere. the forwardsurfaces of said slots defined by the member inclining forwardly andoutwardly to approximately the rear edge of the next slot in the series,and the rear edge of each slot extending outwardly in a substantiallyradial direction.

2. Recoil reducingmeans for guns adapted to fire projectiles comprisinga cylindrical member constructed to be supported by the gun barrel andto project in advance of its muzzle, said member having a bore ofuniform diameter to line with the bore of the barrel through which theprojectile may pass, and having several series of relatively narrowcircumferentially extending slots in its wall, the slots in each seriesspaced apart longitudinally of said member and constituting ports forthe discharge of products "of combustion directly to the atmosphere, theforward surfaces of said slots in each series defined by said memberinclining forwardly and outwardly to approximately the rear edge of thenext slot in the same series and the rear edge of each slot extendingoutwardly in a substantially radial direction.

ROBERT H. S. HUGHES.

